unfreeze: Unfreeze a Knowledge Object.

In causalDisco: Tools for Causal Discovery on Observational Data

Unfreeze a Knowledge Object.

Description

This allows you to add new variables to the Knowledge object, even though it was frozen earlier by adding a data frame to the knowledge constructor knowledge().

Usage

unfreeze(kn)

Arguments

kn	A Knowledge object.

Value

The same Knowledge object with the frozen attribute set to FALSE.

See Also

Other knowledge functions: +.Knowledge(), add_exogenous(), add_tier(), add_to_tier(), add_vars(), as_bnlearn_knowledge(), as_pcalg_constraints(), as_tetrad_knowledge(), convert_tiers_to_forbidden(), deparse_knowledge(), forbid_edge(), get_tiers(), knowledge(), knowledge_to_caugi(), remove_edge(), remove_tiers(), remove_vars(), reorder_tiers(), reposition_tier(), require_edge(), seq_tiers()

Examples

# unfreeze allows adding variables beyond the original data frame columns
data(tpc_example)

kn <- knowledge(tpc_example)

# this would error while frozen
try(add_vars(kn, "new_var"))

# unfreeze and add the new variable successfully
kn <- unfreeze(kn)
kn <- add_vars(kn, "new_var")

print(kn)

causalDisco documentation built on April 13, 2026, 5:06 p.m.